PCA's Alien Plant Working Group Least Wanted: Alien Plant Invaders of Natural Areas
Completed Fact Sheets. Alphabetized by Scientific Name

Plants

Goutweed (Aegopodium podagraria)
Tree-of-heaven
(Ailanthus altissima)
Fiveleaf akebia (Akebia quinata)
Silk tree (Albizia julibrissin)
Garlic mustard (Alliaria petiolata)
Porcelainberry (Ampelopsis brevipedunculata)
Giant reed (Arundo donax)
Japanese barberry (Berberis thunbergii)
Paper Mulberry (Broussonetia papyrifera)
Musk thistle (Carduus nutans)
Asiatic sand sedge (Carex kobomugi)
Australian pine (Casuarina equisetifolia)
Oriental bittersweet (Celastrus orbiculatus)
Yellow starthistle (Centaurea solstitialis)
Spotted knapweed (Centaurea stoebe ssp. micranthos, previously C. biebersteinii)
Canada thistle (Cirsium arvense)
Asiatic colubrina (Colubrina asiatica)
Carrotwood (Cupaniopsis anacardioides)
Black swallow-wort (Cynanchum louiseae)
Pale swallow-wort (Cynanchum rossicum)
Russian-olive
(Elaeagnus angustifolia)
Climbing euonymus (Euonymus fortunei)
Leafy spurge (Euphorbia esula)
Japanese knotweed (Fallopia japonica)
English ivy (Hedera helix)
Japanese hop (Humulus japonicus)
West Indian marsh grass (Hymenachne amplexicaulis)
Cogon grass (Imperata cylindrica)
Perennial pepperweed (Lepidium latifolium)
Chinese lespedeza (Lespedeza cuneata)
Bush honeysuckles, exotic (Lonicera cultivars and species)
Japanese honeysuckle (Lonicera japonica)
Purple loosestrife (Lythrum salicaria)
Melaleuca (Melaleuca quinquenervia)
Chinaberry (Melia azedarach)
Velvet tree (Miconia calvescens)
Japanese stiltgrass (Microstegium vimineum)
Fire tree (Morella faya, previously Myrica faya)
Eurasian watermilfoil (Myriophyllum spicatum)
Burma reed (Neyraudia reynaudiana)
Princess tree (Paulownia tomentosa)
Fountain grass (Pennisetum setaceum)
Mile-a-minute (Persicaria perfoliata) Updated
Amur corktree (Phellodendron amurense)
Common reed (Phragmites australis)
White poplar (Populus alba)
Strawberry guava (Psidium cattleianum)
Kudzu (Pueraria montana var. lobata)
Fig buttercup (Ranunculus ficaria)Updated
Annual bastard-cabbage (Rapistrum rugosum)
Common buckthorn (Rhamnus cathartica)
Black locust (Robinia pseudoacacia)
Multiflora rose (Rosa multiflora)
Yellow Himalayan raspberry (Rubus ellipticus)
Wineberry (Rubus phoenicolasius)
Tall fescue (Schedonorus phoenix, previously Lolium arundinaceum)
Japanese spiraea (Spiraea japonica)
Smooth cordgrass (Spartina alterniflora)
Salt cedar (Tamarix species)
Siberian elm (Ulmus pumila)
Common mullein (Verbascum thapsus)
Chinese wisteria (Wisteria sinensis) New
Japanese wisteria (Wisteria floribunda)
New

General Educational

Weeds Gone Wild Brochure - Printable brochure - PDF (4.5 MB)
What the heck is an Invasive Plant? - Printable brochure - PDF (810 KB)
Other public outreach materials

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Comments, suggestions, and questions about the website should be directed to the webmaster.
http://www.nps.gov/plants/alien/fact.htm
Last updated: 19-Apr-2010